MAX6357UWUT

Overview

The MAX6357UWUT is a triple microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors three independent voltage inputs and asserts active-low reset outputs when any monitored supply drops below its preset threshold. The device features a debounced manual reset input and operates with a maximum supply voltage of 5.5V. It draws only 20µA of supply current, making it suitable for low-power applications. The unit is housed in a compact SOT-23-6 surface-mount package and functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Monitors up to three independent power-supply voltages simultaneously
• Provides active-low push-pull reset outputs referenced to VCC1 or VCC2
• Includes a debounced manual reset input compatible with TTL/CMOS logic
• Operates with ultra-low 20µA supply current consumption

Applications

• Multi-rail embedded system power management
• Microprocessor board voltage supervision
• Portable battery-operated equipment monitoring

Procurement Notes

Verify the specific suffix code (e.g., U, W) against official datasheets to confirm exact threshold voltages and output configurations. Confirm availability status as distribution channels may list obsolete or limited-stock items. Ensure RoHS compliance documentation matches the manufacturing date code. Cross-reference pinouts carefully due to potential package variations within the series.

Selection Notes

Select this component when simultaneous monitoring of three distinct voltage rails is required without external discrete components. Verify that the factory-set threshold voltages align with the target supply levels. Consider the active-low push-pull output drive capability for direct interfacing with microcontroller reset pins. Evaluate the 280ms typical reset delay against system startup timing requirements.

Part Context

This part belongs to the MAX6351–MAX6360 family of dual and triple voltage supervisors designed to improve system reliability. These devices replace multiple discrete monitoring ICs, reducing board space and component count. The series offers precision thresholds and low power consumption, addressing common needs in industrial and consumer electronics where stable power sequencing is critical for proper microprocessor operation.

Replacement Considerations

Check MAX6357TWUT+T for similar triple-monitoring functionality in SOT-23-6 packages. Verify if MAX6358LSUT+T meets requirements despite having different output types and watchdog features. Confirm electrical compatibility before substituting.